Flash Flood Warning 52, NWS Wilmington, OH

Area Forecast Discussion
National Weather Service Wilmington OH
314 PM EDT Tue Aug 11 2026

.WHAT HAS CHANGED...
Flash flood risk has increased in some areas for tonight/early
Wednesday.

&&

.KEY MESSAGES...
1) Severe weather and flash flooding are possible with thunderstorms
through early this evening.

2) Additional thunderstorms will continue to pose a flash flood risk
tonight through Wednesday night.

3) Additional chances for thunderstorms and heavy rainfall are
possible through the end of the week with drier weather possible this
weekend.

&&

.DISCUSSION...
The latest round of thunderstorms has begun affecting the area early
this afternoon. Based on latest trends, areas near and south of I-70
look to see the greatest risk for severe weather with this latest
round. The environment continues to be supportive of
damaging/destructive wind gusts, where localized gusts could reach
70 to 80 mph leading to more significant local damage compared to 60
mph wind gusts. In addition, there is the risk for isolated tornadoes
within line segments.

Storm motion will tend to be to the southeast, limiting training, however
due to high rainfall rates localized flash flooding will be possible
particularly in any more vulnerable areas that have received a lot
of rainfall within the past 24 hours, such as portions of
central/east central Ohio.

KEY MESSAGE 2)
Initial convection should move through the area by early this
evening, however any reprieve may be brief as plenty of high
resolution guidance suggests additional storms moving into the area
or developing over the area. The most likely area for this to occur
appears to be over southeast Indiana/southwest Ohio/northern Kentucky
however confidence in exact placement of new nocturnal convection is
rather low and it is possible this could be placed further north.

Wherever the new convection orients itself will have a low end severe
risk for damaging winds. A more significant flash flood risk may
emerge especially if activity aligns northwest to southeast and
repetitively moves across the same area. At this time, a Flood Watch
remains across the entire area through tonight/early Wednesday
morning.

It's unclear whether the balance of Wednesday may see a
another lull in convection, or if another round may impact at least
part of the area. If another round does occur, it could be late in
the day or Wednesday night, with continued risks for flash flooding
and at least a low end severe risk for damaging wind. Later updates
will have to refine and resolve timing/placement details of any late
Wednesday/Wednesday night convection.

KEY MESSAGE 3)
The active pattern may continue through the end of the week, but
details on individual disturbances and timing of hazardous weather
impacts are uncertain. Either way, we continue with a chance of
showers and thunderstorms through Friday. Guidance does suggest the
potential for drying to occur this weekend, and while we can't
complelty rule out a thunderstorm, the trend should be down for the
weekend.

&&

.AVIATION /18Z TUESDAY THROUGH SUNDAY/...
The latest round of storms will impact all terminals this afternoon.
Have allowed for a 2-4 hour TEMPO group for thunderstorms - may have
to amend for higher wind gusts that could be aoa 40 to 50 kt as
thunderstorms approach. A reprieve may be brief, as a lot of
guidance suggests another round of evening/overnight thunderstorms.
Confidence in location and timing are both low, so only have a PROB30
at this time. But as details become more clear, we will be able to
add more details to aviation forecasts.

OUTLOOK...Thunderstorms are possible at times through Friday.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...Flood Watch through Wednesday morning for OHZ026-034-035-042>046-
     051>056-060>065-070>074-077>082-088.
KY...Flood Watch through Wednesday morning for KYZ089>100.
IN...Flood Watch through Wednesday morning for INZ050-058-059-066-
     073>075-080.

&&

DISCUSSION...BPP
AVIATION...BPP

Hazardous Weather Outlook
National Weather Service Wilmington OH
514 AM EDT Tue Aug 11 2026

INZ050-058-059-066-073>075-080-KYZ089>100-OHZ026-034-035-042>046-
051>056-060>065-070>074-077>082-088-120915-
Wayne-Fayette-Union-Franklin-Ripley-Dearborn-Ohio-Switzerland-
Carroll-Gallatin-Boone-Kenton-Campbell-Owen-Grant-Pendleton-Bracken-
Robertson-Mason-Lewis-Hardin-Mercer-Auglaize-Darke-Shelby-Logan-
Delaware-Miami-Champaign-Clark-Madison-Licking-Preble-Montgomery-
Greene-Pickaway-Fairfield-Butler-Warren-Clinton-Ross-Hocking-
Hamilton-Clermont-Brown-Highland-Adams-Pike-Scioto-
514 AM EDT Tue Aug 11 2026

...FLOOD WATCH IN EFFECT THROUGH WEDNESDAY MORNING...

This Hazardous Weather Outlook is for east central Indiana,
southeast Indiana, northeast Kentucky, northern Kentucky, central
Ohio, south central Ohio, southwest Ohio and west central Ohio.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

Several rounds of thunderstorms are expected today. Damaging winds,
potentially significant, may result in widespread damage and power
outages. Isolated tornadoes cannot be ruled out.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

Preliminary Local Storm Report
National Weather Service Wilmington OH
234 PM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0915 AM     Tstm Wnd Dmg     7 NNE College Corner    39.67N 84.78W
08/11/2026                   Preble             OH   Emergency Mngr

            15 inch diameter tree down on Watt Road.

&&

Preliminary Local Storm Report
National Weather Service Wilmington OH
241 PM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0923 AM     Tstm Wnd Dmg     Urbana                  40.11N 83.75W
08/11/2026                   Champaign          OH   Public

            Large trees snapped on Church Street. Photos
            posted on social media.

&&

Special Weather Statement
National Weather Service Wilmington OH
305 PM EDT Tue Aug 11 2026

OHZ055-056-064-065-073-074-112000-
Licking OH-Fairfield OH-Ross OH-Franklin OH-Hocking OH-Pickaway OH-
305 PM EDT Tue Aug 11 2026

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF SOUTHEASTERN
FRANKLIN...FAIRFIELD...HOCKING...PICKAWAY...SOUTHERN LICKING AND
NORTHEASTERN ROSS COUNTIES THROUGH 400 PM EDT...

At 304 PM EDT, a strong thunderstorm was located near Grove City,
moving east at 35 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Columbus, Newark, Lancaster, Reynoldsburg, Grove City, Upper
Arlington, Gahanna, Pickerington, Circleville, Bexley, Heath, Logan,
Granville, Pataskala, Canal Winchester, Groveport, Ashville,
Baltimore, Buckeye Lake, and Hebron.

This includes the following Interstates...
 I-70 in Ohio between mile markers 93 and 142, and near mile marker
144.
 I-71 in Ohio between mile markers 94 and 112.

If outdoors, consider seeking shelter inside a sturdy building.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central Ohio. A Severe Thunderstorm Watch also remains in effect
until 800 PM EDT for central and south central Ohio.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

&&

LAT...LON 3995 8220 3995 8223 3991 8223 3993 8246
      3984 8247 3983 8240 3975 8240 3974 8237
      3960 8238 3959 8227 3941 8233 3949 8320
      4001 8312 4006 8219
TIME...MOT...LOC 1904Z 279DEG 27KT 3980 8312

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Clark

Preliminary Local Storm Report
National Weather Service Wilmington OH
323 PM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     Tstm Wnd Gst     2 WSW Oxford            39.50N 84.78W
08/11/2026  M48 MPH          Butler             OH   AWOS

            AWOS station KOXD Oxford Miami University
            Apt.

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Preliminary Local Storm Report
National Weather Service Wilmington OH
330 PM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0330 PM     Hail             Harveysburg             39.50N 84.01W
08/11/2026  M0.70 Inch       Warren             OH   Fire Dept/Rescue

&&

Preliminary Local Storm Report
National Weather Service Wilmington OH
331 PM EDT Tue Aug 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0325 PM     Tstm Wnd Gst     3 NE Fairfield          39.36N 84.52W
08/11/2026  M53 MPH          Butler             OH   ASOS

            ASOS station KHAO Butler County Regional
            Airport.

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